What's the difference between Menzerna SIP and IP? They both have the same cut and shine ratings. For some reason, I'm getting more MBs to detail and their harder clear coats are a bit of a pain. I'm currently using Meg's 83 and 80 but I've heard that Menzerna will cut faster and better than Meg's on German cars. Power Gloss + SIP or Power Gloss + IP?